| BQ4847Y | Texas Instruments | RTC W NVSRAM Control, Watchdog Timer, uP Reset, Interrupts and Battery Low Warning |
| BQ4850Y | Texas Instruments | RTC Module With 512Kx8 NVSRAM |
| BQ4852Y | Texas Instruments | RTC Module With 512Kx8 NVSRAM, Watchdog Timer, uP Reset, Interrupts and Battery Low Warning |
| DP8573A | National Semiconductor | Real Time Clock (RTC) |
| DS1284 | Maxim | Watchdog Timekeeper Chip |
| DS1286 | Maxim | Watchdog Timekeeper |
| DS12885 | Maxim | Real-Time Clock |
| DS12887 | Maxim | Real-Time Clock |
| DS12887A | Maxim | Real-Time Clock |
| DS12C887 | Maxim | Real-Time Clock |
| DS12C887A | Maxim | Real-Time Clock |
| DS1302 | Maxim | Trickle-Charge Timekeeping Chip |
| DS1305 | Maxim | Serial Alarm Real-Time Clock |
| DS1306 | Maxim | Serial Alarm Real-Time Clock (RTC) |
| DS1307 | Maxim | 64 x 8, Serial, I2C Real-Time Clock |
| DS1315 | Maxim | Phantom Time Chip |
| DS1337 | Maxim | Serial Real-Time Clock |
| DS1338 | Maxim | 2-Wire RTC with 56-Byte NV SRAM |
| DS1339 | Maxim | Serial Real-Time Clock |
| DS1340 | Maxim | I2C RTC with Trickle Charger |